DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Block · Chapter 13

M86-M90 Other osteopathies (M86-M90)

Block M86-M90 groups 5 categories with 732 billable codes in FY2027. 24 codes are new this year.

Where it sits

  1. Chapter 13 Diseases of the musculoskeletal system and connective tissue (M00-M99)
  2. M86-M90 Other osteopathies (M86-M90)

Neighbouring blocks

Categories
5
Billable codes
732
CC codes
436
MCC codes
0
HCC V28 codes
392
New FY2027
24

Categories in M86-M90

  • M86

    Osteomyelitis

    Brodie's abscess or disease → M86.8X-

    • 195 billable codes
    • 195 CC
    • 171 with HCC
    • 24 new
  • M87

    Osteonecrosis

    Osteonecrosis → M87.9

    • 217 billable codes
    • 217 CC
    • 173 with HCC
  • M88

    Osteitis deformans [Paget's disease of bone]

    Osteitisdeformans → M88.9

    • 26 billable codes
  • M89

    Other disorders of bone

    Osteolysis → M89.50

    • 222 billable codes
    • 24 with HCC
  • M90

    Osteopathies in diseases classified elsewhere

    Osteopathyin (due to)specified diseases classified elsewhere → M90.8

    • 72 billable codes
    • 24 CC
    • 24 with HCC

FY2027 changes in M86-M90

  • M86.8X11 Other osteomyelitis, right shoulder New FY2027
  • M86.8X12 Other osteomyelitis, left shoulder New FY2027
  • M86.8X19 Other osteomyelitis, unspecified shoulder New FY2027
  • M86.8X21 Other osteomyelitis, right upper arm New FY2027
  • M86.8X22 Other osteomyelitis, left upper arm New FY2027
  • M86.8X29 Other osteomyelitis, unspecified upper arm New FY2027
  • M86.8X31 Other osteomyelitis, right forearm New FY2027
  • M86.8X32 Other osteomyelitis, left forearm New FY2027
  • M86.8X39 Other osteomyelitis, unspecified forearm New FY2027
  • M86.8X41 Other osteomyelitis, right hand New FY2027
  • M86.8X42 Other osteomyelitis, left hand New FY2027
  • M86.8X49 Other osteomyelitis, unspecified hand New FY2027

20 more, and 0 new codes with a 7th character: all FY2027 changes.

Index main terms

  • Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis) → M86 (150 entries)
  • Osteonecrosis → M87 (119 entries)
  • Defect, defective → M89 (52 entries)
  • Disorder (of) → M89 (24 entries)
  • Osteopathy → M89, M90 (24 entries)
  • Paget's disease → M88 (24 entries)
  • Hypertrophy, hypertrophic → M89 (23 entries)
  • Osteoarthropathy (hypertrophic) → M89 (23 entries)
  • Osteolysis → M89 (23 entries)
  • Arrest, arrested → M89 (13 entries)
  • Algoneurodystrophy → M89 (11 entries)
  • Osteitis → M88 (3 entries)
  • Necrosis, necrotic (ischemic) → M87 (2 entries)
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) → M86 (1 entry)
  • Brodie's abscess or disease → M86 (1 entry)

+11 more main terms; the search box finds them by word.

Block instructions

Excludes1

  • postprocedural osteopathies (M96.-) M96

Notes that also apply

Chapter 13 instructions (Notes 1, Excludes2 10): printed on the chapter 13 page.